Rule 8.3 - BANCO SANTANDER SA

FORM 8.3

    DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE
              (Rule 8.3 of the City Code on Takeovers and Mergers)


1.   KEY INFORMATION

Name of person dealing        BARCLAYS PLC
(Note 1)
Company dealt in              BANCO SANTANDER SA
Class of relevant security    EUR0.50(REGD)
to which the dealings being
disclosed relate (Note 2)
Date of dealing               30 September 2008

2.   INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a)  Interests and short positions (following dealing) in the class of relevant
security dealt in (Note 3)

                            Long                     Short

                      Number       (%)         Number       (%)

(1) Relevant     272,739,075     4.36%      3,123,164     0.05%
securities
(2) Derivatives   45,678,953     0.73%     65,693,611     1.05%
(other than
options)
(3) Options and   21,490,685     0.34%     17,810,128     0.28%
agreements to
purchase/sell
Total            339,908,713     5.43%     86,626,903     1.39%


(b)  Interests and short positions in relevant securities of the company, other
     than the class dealt in (Note 3)

Class of                    Long                     Short
relevant
security:

                  Number              (%)   Number              (%)

(1) Relevant
securities

(2) Derivatives
(other than
options)

(3) Options and
agreements to
purchase/sell

Total


  (c)  Rights to subscribe (Note 3)

Class of relevant security:   Details



3.   DEALINGS (Note 4)

  (a)  Purchases and sales

Purchase/sale       Number of          Price per unit
                    Securities
Purchase            713                10.4500 EUR
Purchase            44,102             10.5000 EUR
Purchase            60,057             10.5000 EUR
Purchase            1,627              10.4624 EUR
Purchase            1,500              10.3800 EUR
Purchase            1,165              10.2000 EUR
Purchase            436                10.3000 EUR
Purchase            427,067            10.4341 EUR
Purchase            620                10.5000 EUR
Purchase            5,700              10.5700 EUR
Purchase            29,304             10.3877 EUR
Purchase            4,640              10.4976 EUR
Purchase            2,488              10.5000 EUR
Purchase            126,991            10.4550 EUR
Purchase            100                10.1000 EUR
Purchase            2,400              10.3400 EUR
Purchase            13,545             Transfer
Purchase            442                Transfer
Purchase            1,150              10.3500 EUR
Purchase            21,969             10.3516 EUR
Purchase            100                10.1000 EUR
Purchase            1,915              10.3400 EUR
Purchase            14,067             10.4600 EUR
Purchase            150,000            10.4624 EUR
Purchase            300                10.3600 EUR
Purchase            1,728              10.3800 EUR
Purchase            570                10.4700 EUR
Purchase            240                10.2000 EUR
Purchase            6,724              10.5000 EUR
Purchase            124,080            10.5000 EUR
Purchase            30,733             10.5000 EUR
Purchase            957                10.3400 EUR
Purchase            34,462             10.5000 EUR
Purchase            2,000              10.3400 EUR
Purchase            35,982             10.5000 EUR
Purchase            7,236              10.5000 EUR
Purchase            975                10.5000 EUR
Purchase            5,827              10.5000 EUR
Purchase            143,928            10.5000 EUR
Purchase            459                10.5699 EUR
Purchase            3,905              10.5000 EUR
Purchase            5,952              10.5000 EUR
Purchase            417,619            10.2742 EUR
Sale                427,067            10.4341 EUR
Sale                2,864              10.5032 EUR
Sale                126,991            10.4550 EUR
Sale                957                10.3900 EUR
Sale                3,878              10.3400 EUR
Sale                203,898            10.5000 EUR
Sale                17,429             10.4197 EUR
Sale                4,399              10.3534 EUR
Sale                733                10.2000 EUR
Sale                700                Transfer
Sale                126,991            10.4550 EUR
Sale                29,304             10.3877 EUR
Sale                1,100              10.4000 EUR
Sale                32,452             10.5000 EUR
Sale                3,905              10.5000 EUR
Sale                2,000              10.1300 EUR
Sale                4,606              10.5000 EUR
Sale                9,379              10.5000 EUR
Sale                194,015            10.5000 EUR
Sale                12,933             10.5000 EUR
Sale                28,477             10.5000 EUR
Sale                16,273             10.5000 EUR
Sale                8,029              10.4969 EUR
Sale                461,011            10.4318 EUR
Sale                3,000              10.3100 EUR
Sale                7,427              10.5000 EUR
Sale                14,067             10.4600 EUR
Sale                4,845              10.5000 EUR
Sale                2,673              10.5000 EUR
Sale                26,479             10.5000 EUR
Sale                4,640              10.4976 EUR
Sale                1,000              10.4400 EUR
Sale                1,100              10.4000 EUR
Sale                26,479             10.5000 EUR
Sale                360,338            10.4997 EUR
Sale                133,501            10.4300 EUR
Sale                4,000              10.1200 EUR
Sale                1,276              10.4708 EUR
Sale                43,938             10.3235 EUR
Sale                160                10.3500 EUR

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          4399          10.3534
CFD            Long          15320         10.5
CFD            Short         3384          10.4999

(c)  Options transactions in respect of existing securities

(i)  Writing, selling, purchasing or varying


Product name,   Writing,          Number of          Exercise  Type, e.g.      Expiry      Option money
e.g. call       selling,          securities to      price     American,       date        paid/received
option          purchasing,       which the option             European etc.               per unit (GBP)
                varying etc.      relates (GBP)
Call            Sell              433000            10.6692    EURO           29/12/2008    0.2186
Put             Purchase          433000            9.414      EURO           29/12/2008    0

(ii) Exercising

Product name, e.g.  Number of           Exercise price per
call option         securities          unit (Note 5)



(d)  Other dealings (including new securities) (Note 4)


Nature of transaction Details           Price per unit
(Note 8)                                (if applicable)
                                        (Note 5)


4.   OTHER INFORMATION
None

Agreements, arrangements or understandings relating to options or derivatives


Full details of any agreement, arrangement or understanding between the
person disclosing and any other person relating to the voting rights of
any relevant securities under any option referred to on this form or
relating to the voting rights or future acquisition or disposal of any
relevant securities to which any derivative referred to on this form is
referenced.  If none, this should be stated.




Is a Supplemental Form 8 attached? (Note 9)                 YES


Date of disclosure                         01 October 2008
Contact name                               Geoff Smith
Telephone number                           020 7116 2913
If a connected EFM, name of
offeree/offeror with which connected
If a connected EFM, state nature of
connection (Note 10)

SUPPLEMENTAL FORM 8

DETAILS OF OPEN POSITIONS
(This form should be attached to Form 8.1, Form 8.1(b)(ii) or Form 8.3, as appropriate)


OPEN POSITIONS (Note 1)
Product name,     Written or  Number of securities   Exercise price   Type, e.g.     Expiry date
e.g. call option  purchased   to which the option    (Note 2)         American,
                              or derivative relates                   European etc.
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   -1,500,000             10.0000          EURO           19/12/2008
Option            Purchased   500,000                10.5000          AMER           19/12/2008
Option            Purchased   500,000                12.0000          AMER           19/12/2008
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   433,000                9.4140           EURO           29/12/2008
Option            Purchased   600,000                12.5000          AMER           19/12/2008
Option            Purchased   260,000                9.7500           EURO           19/12/2008
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   1,000,000              14.0000          EURO           19/12/2008
Option            Purchased   1,000,000              15.0000          EURO           17/12/2010
Option            Purchased   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   1,500,000              10.0000          EURO           19/12/2008
Option            Purchased   20,000                 12.0000          EURO           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   55,000                 12.0000          EURO           19/12/2008
Option            Purchased   -55,000                12.0000          EURO           19/12/2008
Option            Purchased   -20,000                12.0000          EURO           18/12/2009
Option            Purchased   7,500                  12.0000          EURO           19/12/2008
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   -15,000                11.0000          EURO           18/12/2009
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   -5,000                 9.5000           EURO           19/12/2008
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   215,285                9.2900           EURO           20/04/2009
Option            Purchased   250,000                10.5000          AMER           19/12/2008
Option            Purchased   120,000                10.5000          EURO           19/06/2009
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -2,000,000             21.0000          AMER           19/12/2008
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
Option            Purchased   -250,000               14.5000          AMER           19/12/2008
Option            Purchased   -250,000               14.5000          AMER           19/12/2008
Option            Purchased   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -260,000               10.5000          EURO           19/12/2008
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -135,012               14.0200          EURO           18/12/2009
Option            Purchased   -135,012               14.0200          EURO           18/12/2009
Option            Purchased   -114,995               10.0100          EURO           19/12/2008
Option            Purchased   -114,995               10.0100          EURO           19/12/2008
Option            Purchased   -62,159                8.7900           EURO           19/12/2008
Option            Purchased   -62,159                8.7900           EURO           19/12/2008
Option            Purchased   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   -1,000,000             14.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             14.0000          AMER           19/12/2008
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
Option            Purchased   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   -433,000               10.6692          EURO           29/12/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010

Notes
1. Where there are open option positions or open derivative positions (except for CFDs), full details should be given.
Full details of any  existing agreements to purchase or to sell  should also be given on this form.

2. For all prices and other monetary amounts, the currency must be stated.

For details of the Code's dealing disclosure requirements, see Rule 8 and its Notes which can be viewed on the Takeover
Panel's website at www.thetakeoverpanel.org.uk